General:
* A company of dancers
* A troupe of dancers
* A group of dancers
* An ensemble of dancers
* A cast of dancers
Specific:
* A ballet of dancers (for a group of dancers performing a ballet)
* A line of dancers (for dancers lined up in a row)
* A circle of dancers (for dancers in a circle formation)
* A whirl of dancers (for dancers moving in a swirling motion)
Creative:
* A symphony of movement (for a coordinated and intricate dance performance)
* A tapestry of motion (for a diverse and visually captivating dance performance)
* A whirlwind of grace (for a dynamic and elegant dance performance)
Ultimately, the best collective noun to use will depend on the specific type of dance and the overall effect you want to convey.